The phrase "how much longer" can be translated into Spanish in several ways depending on the context. Common translations include:

• ¿Cuánto falta? — Literally means "how much is left?" and is used to ask how much more time remains.
• ¿Cuánto tiempo más? — Translates as "how much more time?" and is another way to ask the same question.
• Hasta cuándo — Means "until when?" and can be used to inquire about the duration something will continue.

These expressions are used to ask about the remaining time for an event or action.